topic Intel Phi affinity with openMP in Software Archive https://community.intel.com/t5/Software-Archive/Intel-Phi-affinity-with-openMP/m-p/1044824#M47451 <P>&nbsp;</P> <P>Hi,</P> <P>I am testing the Intel Phi affinity with openMP. Please explain what is the default openMP affinity on Intel Phi. That is when <STRONG>#pragma omp parallel proc_bind(xxx)</STRONG> is not specifying.</P> <P>The following figure shows the time spent by an algorithm when <STRONG>spread, close and default</STRONG> affinities are set. The program runs in offload mode.<span class="lia-inline-image-display-wrapper" image-alt="affinity.jpg"><img src="https://community.intel.com/t5/image/serverpage/image-id/7506i15ED7C2330A7677F/image-size/large?v=v2&amp;px=999&amp;whitelist-exif-data=Orientation%2CResolution%2COriginalDefaultFinalSize%2CCopyright" role="button" title="affinity.jpg" alt="affinity.jpg" /></span></P> <P>&nbsp;</P> <P>I noticed the default affinity is better than spread or close. Why?</P> <P>Thank you.</P> Tue, 28 Apr 2015 04:29:48 GMT Mahendra_S_ 2015-04-28T04:29:48Z Intel Phi affinity with openMP https://community.intel.com/t5/Software-Archive/Intel-Phi-affinity-with-openMP/m-p/1044824#M47451 <P>&nbsp;</P> <P>Hi,</P> <P>I am testing the Intel Phi affinity with openMP. Please explain what is the default openMP affinity on Intel Phi. That is when <STRONG>#pragma omp parallel proc_bind(xxx)</STRONG> is not specifying.</P> <P>The following figure shows the time spent by an algorithm when <STRONG>spread, close and default</STRONG> affinities are set. The program runs in offload mode.<span class="lia-inline-image-display-wrapper" image-alt="affinity.jpg"><img src="https://community.intel.com/t5/image/serverpage/image-id/7506i15ED7C2330A7677F/image-size/large?v=v2&amp;px=999&amp;whitelist-exif-data=Orientation%2CResolution%2COriginalDefaultFinalSize%2CCopyright" role="button" title="affinity.jpg" alt="affinity.jpg" /></span></P> <P>&nbsp;</P> <P>I noticed the default affinity is better than spread or close. Why?</P> <P>Thank you.</P> Tue, 28 Apr 2015 04:29:48 GMT https://community.intel.com/t5/Software-Archive/Intel-Phi-affinity-with-openMP/m-p/1044824#M47451 Mahendra_S_ 2015-04-28T04:29:48Z